fix(auth): end the identity-provider session on sign-out and force re-authentication on sign-in

Ordinary Sign out cleared only the QQQ session; the provider session left in the
browser silently signed the same person back in (prompt=login alone was already
observed reusing retained SSO on real Authentik). Sign out now runs the provider
end-session flow when the server supports it, and every sign-in also sends
max_age=0. Stored-session restore after sign-out was checked: not a cause.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

CHANGELOG.md

@@ -3,6 +3,7 @@
 ## 1.0.4 (versionCode 6)
 
 - Loading the server's metadata no longer fails with "Error loading QInstance: timeout" on a handheld. The metadata response is about 1.7 MB and takes the server 4 to 8 seconds to build, and the default 10 second read timeout expired. That one call now allows 60 seconds; every other call keeps its short timeout. A timeout now reads "Timed out after 60.0s loading the server's metadata from <server>/qqq/v1/metaData".
+- Sign-out now also ends the identity-provider session in the browser when the server supports it (the same flow as "Sign out of company", now behind the single **Sign out** action), and every browser sign-in sends `max_age=0` next to `prompt=login`. Before, ordinary Sign out cleared only the QQQ session, so the provider session left in the browser silently signed the same person straight back in on the next sign-in. Servers without provider logout still get local plus QQQ sign-out. Stored-session restore after sign-out was checked and is not a cause (test added).
 - Includes 1.0.3 (versionCode 5): string widget icons and summary-only help content from current QQQ core are accepted. (PR 24)
 
 ## 1.0.2 (versionCode 4), candidate

docs/AUTHENTICATION.md

@@ -63,7 +63,7 @@ The fresh-login prompt is a request to the provider, not cryptographic proof of
 
 ## Optional company sign-out (implementation awaiting qualification)
 
-Ordinary **Sign out** continues to end only the QQQ session. The scanner also exposes a separate **Sign out of company** action in Account when the server advertises API1.10 or later within major1, feature `nativeSessionLogout`, and OAuth2 metadata `nativeSessionLogout` with flow `OIDC_RP_INITIATED_LOGOUT` and `postLogoutRedirectUris`. Other library hosts opt into that separate action with `LocalCompanySignOutEnabled`; it is disabled by default. No automatic provider-logout policy is selected. The confirmation explains that company sign-out may affect other applications in the browser.
+Since 1.0.4, **Sign out** in Account ends the QQQ session and, when the server advertises API1.10 or later within major1, feature `nativeSessionLogout`, and OAuth2 metadata `nativeSessionLogout` with flow `OIDC_RP_INITIATED_LOGOUT` and `postLogoutRedirectUris`, also ends the provider session in the browser (formerly the separate **Sign out of company** action; without that support Sign out stays QQQ-only). Other library hosts opt into provider sign-out with `LocalCompanySignOutEnabled`; it is disabled by default. No automatic provider-logout policy is selected. The confirmation explains that company sign-out may affect other applications in the browser.
 
 Register the installed package's exact callback separately as a provider **post-logout** redirect, even when it matches the existing login callback. The client sends `{"nativeLogout":{"postLogoutRedirectUri":"<registered callback>"}}` to the existing `POST /qqq/v1/logout`. Its optional `nativeLogoutData` contains `issuer`, `endSessionEndpoint`, `postLogoutRedirectUri` and sensitive `idTokenHint`. Old sessions or unsupported servers may legitimately omit this data. The ordinary logout request remains unchanged.
 

qqq/android/mobileapp/src/main/java/com/kingsrook/qqq/frontend/android/mobileapp/ui/QNavigator.kt

@@ -132,7 +132,9 @@ class QNavigator(initialController: NavHostController?, val qViewModel: QViewMod
    /*******************************************************************************
     ** Route sign-out through explicit process-exit confirmation so pending work is not silently abandoned.
     *******************************************************************************/
-   fun requestSignOut() = requestLeave("Sign out?", "Sign out", alwaysConfirm = true) { qViewModel.requestLogout() }
+   fun requestSignOut(providerSignOut: com.kingsrook.qqq.frontend.android.mobileapp.ui.authentication.OAuth2LogoutBinding? = null) =
+      if (providerSignOut != null) requestCompanySignOut(providerSignOut)
+      else requestLeave("Sign out?", "Sign out", alwaysConfirm = true) { qViewModel.requestLogout() }
 
    /*******************************************************************************
     ** The same guarded leave/cancel policy applies to explicitly enabled provider sign-out.

qqq/android/mobileapp/src/main/java/com/kingsrook/qqq/frontend/android/mobileapp/ui/authentication/QOAuth2Login.kt

@@ -43,6 +43,13 @@ import kotlin.coroutines.resumeWithException
  *******************************************************************************/
 val LocalOAuth2Discovery = staticCompositionLocalOf<suspend (OAuth2LoginBinding) -> AuthorizationServiceConfiguration> { ::discoverOAuth2 }
 
+/*******************************************************************************
+ ** Sent with every interactive sign-in next to prompt=login. OIDC max_age=0 independently requires the provider to
+ ** re-authenticate, so a provider session left in the browser cannot silently sign the next person in; the real
+ ** Authentik test showed prompt=login alone reusing retained SSO (docs/AUTHENTICATION.md).
+ *******************************************************************************/
+val OAUTH2_FORCE_REAUTH_PARAMETERS: Map<String, String> = mapOf("max_age" to "0")
+
 /*******************************************************************************
  ** Browser authorization is standard AppAuth; API1.10 exchanges the code and validates the retained original nonce.
  *******************************************************************************/
@@ -93,7 +100,8 @@ fun QOAuth2Login(viewModel: QViewModel, metadata: OAuth2AuthenticationMetaData,
                         val request = AuthorizationRequest.Builder(
                            configuration, binding.clientId, ResponseTypeValues.CODE,
                            Uri.parse(binding.redirectUri)
-                        ).setScope(binding.scopes).setPrompt(binding.prompt).setResponseMode("query").build()
+                        ).setScope(binding.scopes).setPrompt(binding.prompt).setAdditionalParameters(OAUTH2_FORCE_REAUTH_PARAMETERS)
+                           .setResponseMode("query").build()
                         check(request.codeVerifierChallengeMethod == "S256")
                         if (viewModel.beginOAuth2Browser(
                               generation, binding, requireNotNull(request.state),

qqq/android/mobileapp/src/main/java/com/kingsrook/qqq/frontend/android/mobileapp/ui/horseshoe/NavigationSurfaces.kt

@@ -24,6 +24,7 @@ import com.kingsrook.qqq.frontend.android.mobileapp.viewmodel.LoadState
 import com.kingsrook.qqq.frontend.android.mobileapp.viewmodel.QViewModel
 import com.kingsrook.qqq.frontend.android.core.model.metadata.authentication.OAuth2AuthenticationMetaData
 import com.kingsrook.qqq.frontend.android.mobileapp.ui.authentication.LocalCompanySignOutEnabled
+import com.kingsrook.qqq.frontend.android.mobileapp.ui.authentication.OAuth2LogoutBinding
 import com.kingsrook.qqq.frontend.android.mobileapp.ui.authentication.oauth2LogoutBinding
 
 /*******************************************************************************
@@ -34,10 +35,20 @@ val LocalOpenDiagnostics = compositionLocalOf<(() -> Unit)?> { null }
 val LocalBusinessNavigationEnabled = compositionLocalOf { true }
 
 /*******************************************************************************
- ** Expose account actions while keeping optional company sign-out separate from ordinary local sign-out.
+ ** Expose account actions; sign-out also ends the provider session where the host and server support it.
+ *******************************************************************************/
+/*******************************************************************************
+ ** Sign-out ends the identity-provider session too whenever the host enables it and the server supports it;
+ ** otherwise a session left in the browser silently signs the next sign-in back in. Null means local-only sign-out.
+ *******************************************************************************/
+fun providerSignOutBinding(binding: OAuth2LogoutBinding?, serverSupportsProviderLogout: Boolean): OAuth2LogoutBinding? =
+   if (serverSupportsProviderLogout) binding else null
+
+/*******************************************************************************
+ ** Resolve the provider sign-out binding for the current server, or null when it is disabled or unsupported.
  *******************************************************************************/
 @Composable
-internal fun AccountDialog(model: QViewModel, dismiss: () -> Unit) {
+fun rememberProviderSignOutBinding(model: QViewModel): OAuth2LogoutBinding? {
    val companyLogout = if (LocalCompanySignOutEnabled.current)
       ((model.authenticationMetaDataLoadState as? LoadState.Success)?.value as? OAuth2AuthenticationMetaData)?.let {
          oauth2LogoutBinding(it, model.environment.baseUrl, LocalContext.current.packageName)
@@ -53,6 +64,12 @@ internal fun AccountDialog(model: QViewModel, dismiss: () -> Unit) {
          supportsCompanyLogout = false
       }
    }
+   return providerSignOutBinding(companyLogout, supportsCompanyLogout)
+}
+
+@Composable
+internal fun AccountDialog(model: QViewModel, dismiss: () -> Unit) {
+   val providerSignOut = rememberProviderSignOutBinding(model)
    AlertDialog(
       onDismissRequest = dismiss, title = { Text("Account", Modifier.testTag("accountDialog.title")) },
       text = {
@@ -60,13 +77,8 @@ internal fun AccountDialog(model: QViewModel, dismiss: () -> Unit) {
             Text(if (model.isAuthenticated) "Current User:  ${model.sessionUserFullName}" else "Not currently logged in")
             TextButton(enabled = model.isAuthenticated && !model.isLogoutRequested, onClick = {
                dismiss()
-               model.qNavigator.requestSignOut()
+               model.qNavigator.requestSignOut(providerSignOut)
             }) { Text("Sign out") }
-            if (companyLogout != null && supportsCompanyLogout)
-               TextButton(enabled = model.isAuthenticated && !model.isLogoutRequested, onClick = {
-                  dismiss()
-                  model.qNavigator.requestCompanySignOut(companyLogout)
-               }) { Text("Sign out of company") }
          }
       }, confirmButton = { TextButton(onClick = dismiss) { Text("Close") } })
 }

qqq/android/mobileapp/src/test/java/com/kingsrook/qqq/frontend/android/mobileapp/viewmodel/QViewModelLogoutTest.kt

@@ -13,7 +13,9 @@ import com.kingsrook.qqq.frontend.android.core.model.metadata.authentication.OAu
 import com.kingsrook.qqq.frontend.android.core.model.processes.ProcessStepResult
 import com.kingsrook.qqq.frontend.android.mobileapp.container.QAppContainer
 import com.kingsrook.qqq.frontend.android.mobileapp.data.MockPreferencesDataStore
+import com.kingsrook.qqq.frontend.android.mobileapp.ui.authentication.OAUTH2_FORCE_REAUTH_PARAMETERS
 import com.kingsrook.qqq.frontend.android.mobileapp.ui.authentication.OAuth2LoginBinding
+import com.kingsrook.qqq.frontend.android.mobileapp.ui.horseshoe.providerSignOutBinding
 import com.kingsrook.qqq.frontend.android.mobileapp.ui.authentication.OAuth2LogoutBinding
 import com.kingsrook.qqq.frontend.android.mobileapp.ui.authentication.OAuth2LogoutPhase
 import kotlinx.coroutines.Dispatchers
@@ -145,12 +147,60 @@ class QViewModelLogoutTest {
       assertNull(json.decodeFromString<ManageSessionResponse>("""{"uuid":"s","values":{"user":{"name":"  "}}}""").userName)
    }
 
+   /*******************************************************************************
+    ** After sign-out (ordinary or provider) a restarted app finds no stored session and does not resume one.
+    *******************************************************************************/
+   @Test
+   fun restartAfterSignOutDoesNotRestoreTheSession() = runTest()
+   {
+      Dispatchers.setMain(StandardTestDispatcher(testScheduler))
+      try {
+         for (provider in listOf(false, true)) {
+            val store = MockPreferencesDataStore()
+            val repository = LogoutRepository()
+            val model = signedInModel(repository, store)
+            assertEquals("session-1", store.preferences[com.kingsrook.qqq.frontend.android.mobileapp.data.SESSION_UUID_KEY])
+            if (provider) assertNotNull(companyLogout(model))
+            else { model.requestLogout(); model.logOut().join() }
+            assertNull(store.preferences[com.kingsrook.qqq.frontend.android.mobileapp.data.SESSION_UUID_KEY]?.takeIf { it.isNotEmpty() })
+            val restartedRepository = LogoutRepository()
+            val restarted = QViewModel(restartedRepository, store)
+            advanceUntilIdle()
+            assertFalse(restarted.isAuthenticated)
+            assertEquals("", restarted.sessionUUID)
+            assertEquals(0, restartedRepository.metaDataCalls)
+         }
+      } finally {
+         Dispatchers.resetMain()
+      }
+   }
+
+   /*******************************************************************************
+    ** Sign-out reaches the identity provider whenever the server supports it, never silently local-only.
+    *******************************************************************************/
+   @Test
+   fun signOutUsesProviderLogoutWhenSupported() {
+      val binding = OAuth2LogoutBinding(loginBinding, REDIRECT)
+      assertEquals(binding, providerSignOutBinding(binding, true))
+      assertNull(providerSignOutBinding(binding, false))
+      assertNull(providerSignOutBinding(null, true))
+   }
+
+   /*******************************************************************************
+    ** Every interactive sign-in forces re-authentication, so a lingering provider session cannot sign the next user in.
+    *******************************************************************************/
+   @Test
+   fun authorizationRequestForcesReauthentication() {
+      assertEquals(mapOf("max_age" to "0"), OAUTH2_FORCE_REAUTH_PARAMETERS)
+      assertEquals("login", loginBinding.prompt)
+   }
+
    /*******************************************************************************
     ** Complete a native browser login against the fake repository so sign-out tests start authenticated.
     *******************************************************************************/
-   private fun TestScope.signedInModel(repository: LogoutRepository): QViewModel {
+   private fun TestScope.signedInModel(repository: LogoutRepository, store: MockPreferencesDataStore = MockPreferencesDataStore()): QViewModel {
       QAppContainer.availableEnvironments = listOf(Environment("Test", SERVER))
-      val model = QViewModel(repository, MockPreferencesDataStore())
+      val model = QViewModel(repository, store)
       advanceUntilIdle()
       val generation = requireNotNull(model.prepareOAuth2Login(loginBinding))
       assertTrue(model.beginOAuth2Browser(generation, loginBinding, STATE, NONCE, VERIFIER))
@@ -182,6 +232,7 @@ class QViewModelLogoutTest {
    private class LogoutRepository : QQQRepository {
       val calls = mutableListOf<String>()
       var activeSession = ""
+      var metaDataCalls = 0
 
       override suspend fun getAuthenticationMetaData(): BaseAuthenticationMetaData = OAuth2AuthenticationMetaData(
          "oauth", values = OAuth2AuthenticationMetaData.Values(
@@ -214,7 +265,7 @@ class QViewModelLogoutTest {
 
       override fun setEnvironment(environment: Environment) {}
       override suspend fun manageSession(body: ManageSessionRequest): ManageSessionResponse = error("Not used")
-      override suspend fun getMetaData(frontendName: String, frontendVersion: String, applicationName: String, applicationVersion: String): QInstance = QInstance()
+      override suspend fun getMetaData(frontendName: String, frontendVersion: String, applicationName: String, applicationVersion: String): QInstance { metaDataCalls++; return QInstance() }
       override suspend fun getProcessMetaData(processName: String): QProcessMetaData = error("Not used")
       override suspend fun processInit(processName: String, values: Map<String, Any?>, recordsParam: String?, recordIds: String?, filterJSON: String?, stepTimeoutMillis: Int?): ProcessStepResult = error("Not used")
       override suspend fun processStep(processName: String, processUUID: String, stepName: String, values: Map<String, Any?>, stepTimeoutMillis: Int?): ProcessStepResult = error("Not used")

scanner-host/src/main/java/io/qrun/mobile/scanner/ScannerActivity.kt

@@ -30,6 +30,7 @@ import androidx.compose.material3.TextButton
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.CompositionLocalProvider
 import com.kingsrook.qqq.frontend.android.mobileapp.ui.authentication.LocalCompanySignOutEnabled
+import com.kingsrook.qqq.frontend.android.mobileapp.ui.horseshoe.rememberProviderSignOutBinding
 import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.key
 import androidx.compose.runtime.SideEffect
@@ -405,6 +406,7 @@ private fun DeviceGate(
    viewModel: QViewModel, api: DeviceApi, credentials: DeviceCredentials, onApproval: (Boolean) -> Unit,
    content: @Composable () -> Unit
 ) {
+   val providerSignOut = rememberProviderSignOutBinding(viewModel)
    var attempt by remember { mutableIntStateOf(0) }
    var status by remember(viewModel.sessionUUID) { mutableStateOf("CHECKING") }
    var error by remember { mutableStateOf("") }
@@ -444,6 +446,6 @@ private fun DeviceGate(
       Text("Your administrator can edit this device’s name, short name and description in QQQ before approval.")
       Button(enabled = status != "CHECKING", onClick = { attempt++ }) { Text("Check approval") }
       if (enrollmentConflict) Button(onClick = { credentials.restartPendingEnrollment(); attempt++ }) { Text("Start new registration") }
-      Button(onClick = { viewModel.qNavigator.requestSignOut() }) { Text("Sign out") }
+      Button(onClick = { viewModel.qNavigator.requestSignOut(providerSignOut) }) { Text("Sign out") }
    }
 }